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Convert long URLs to short links instantly. Free URL shortener with history tracking, QR codes, and one-click copy. No signup required.
Convert Base64 encoded strings to scannable QR codes instantly. Adjust error correction, size, and download as PNG. No uploads, fully client-side.
Convert your Gregorian birth date into the Chinese Sexagenary cycle. Generates the Year, Month, Day, and Hour pillars based on solar terms and stems/branches.
Convert any Gregorian date to the Discordian calendar. Get season, day, YOLD year, holydays, and custom format strings instantly.
Calculate estimated fetal weight and gestational age using ultrasound measurements (BPD, HC, AC, FL). Includes percentiles.
Calculate concrete volume, rebar weight, and load capacity for pile cap foundations. Generates an instant Bill of Quantities (BOQ) for construction estimation.
Calculate the estimated due date for twins. Adjusts the standard gestation period to the average delivery time for multiples (37 weeks).
Ensure your custom PC build boots. Verify DDR4/DDR5 compatibility, frequency limits, and capacity constraints against a massive database of motherboards and RAM kits.
Calculate significant differences between two groups with this comprehensive Student's t-test tool. Supports raw data (CSV) and summary statistics for both independent and paired samples. Includes step-by-step logic and critical value lookup.